Catalytic graphitization of three-dimensional wood-derived porous scaffolds

Johnson, Matthew T.; Faber, K. T.

doi:10.1557/jmr.2010.88

Cited by 45 publications

(29 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…carbons carbonized from natural wood [6][7][8]. In [6], using liquid catalysts based on nickel in wood carbon ization, porous carbons with a graphitized phase con tent typical of carbons produced from pitch based graphite were produced retaining the biocarbon porous structure.…”

Section: Microstructure Elastic and Inelastic Properties Of Partiallmentioning

confidence: 99%

“…In [6], using liquid catalysts based on nickel in wood carbon ization, porous carbons with a graphitized phase con tent typical of carbons produced from pitch based graphite were produced retaining the biocarbon porous structure. These biomorphic graphitized carbons showed a significantly higher thermal conductivity in comparison with ordinary quasi amorphous biocar bons [7].…”

Section: Microstructure Elastic and Inelastic Properties Of Partiallmentioning

confidence: 99%

“…The total volume of such microscopic pores in the samples was 65 ± 5% [6]. Measurements of the density of the carbon skeletons themselves using a helium picnometer [8] indicate the formation of additional nanoporosity in biocarbons with T carb > 1000°C comparable to that of BE C sam ples [15].…”

Section: Structural Characterization Of Samplesmentioning

confidence: 99%

“…In recent years, particular interest is attracted by graphitized biocarbon matrices produced also by nat ural wood carbonization only in the presence of tran sition metal catalysts [6][7][8]. Due to the retention of the natural porosity inherent to natural wood and high heat and electrical conductivity of graphite, the fabri cation of graphitized biocarbon matrices is of great practical interest.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Microstructure, elastic and inelastic properties of partially graphitized biomorphic carbons

et al. 2015

View full text Add to dashboard Cite

Abstract-The microstructural characteristics and amplitude dependences of the Young's modulus E and internal friction (logarithmic decrement δ) of biocarbon matrices prepared by beech wood carbonization at temperatures T carb = 850-1600°C in the presence of a nickel containing catalyst have been studied. Using X ray diffraction and electron microscopy, it has been shown that the use of a nickel catalyst during carbon ization results in a partial graphitization of biocarbons at T carb ≥ 1000°C: the graphite phase is formed as 50 to 100 nm globules at T carb = 1000°C and as 0.5 to 3.0 μm globules at T carb = 1600°C. It has been found that the measured dependences E(T carb ) and δ(T carb ) contain three characteristic ranges of variations in the Young's modulus and logarithmic decrement with a change in the carbonization temperature: E increases and δ decreases in the ranges T carb < 1000°C and T carb > 1300°C; in the range 1000 < T carb < 1300°C, E sharply decreases and δ increases. The observed behavior of E(T carb ) and δ(T carb ) for biocarbons carbonized in the presence of nickel correlates with the evolution of their microstructure. The largest values of E are obtained for samples with T carb = 1000 and 1600°C. However, the samples with T carb = 1600°C exhibit a higher suscep tibility to microplasticity due to the presence of a globular graphite phase that is significantly larger in size and total volume.

show abstract

Section: Microstructure Elastic and Inelastic Properties Of Partiallmentioning

confidence: 99%

Section: Microstructure Elastic and Inelastic Properties Of Partiallmentioning

confidence: 99%

Section: Structural Characterization Of Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure, elastic and inelastic properties of partially graphitized biomorphic carbons

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Полученные данные сравниваются с элек-тротранспортными свойствами биоуглеродов, карбони-зированных в подобных условиях с использованием Ni-содержащего катализатора [21].…”

Section: Introductionunclassified

Особенности электрических свойств биоуглеродов BE-C(Fe), карбонизированных в присутствии Fe-содержащего катализатора

Popov¹,

Орлова²,

Gutiérrez‐Pardo

et al. 2017

Физика Твердого Тела

View full text Add to dashboard Cite

Проведено исследование влияния частичной графитизации на электрические и гальваномагнитные свойства биоморфных углеродов BE-C(Fe), полученных карбонизацией древесины бука при температурах 850-1600oC в присутствии железосодержащего катализатора. Использование Fe-катализатора при Tcarb≥1000oC приводит к формированию наноразмерных включений графитовой фазы, при этом ее суммарный объем и размер нанокристаллитов растут с увеличением Tcarb. Получены данные по концентрации и подвижности носителей заряда. Показано, что по типу проводимости и особенностям магнетосопротивления частично графитизированные углероды BE-C(Fe) c Tcarb≥1000oC относятся к сильно разупорядоченным металлическим системам, проводимость которых может быть описана с учетом вклада квантовых поправок, главным образом поправки, обусловленной электрон-электронным взаимодействием. Показано, что для образцов BE-C(Fe) c 1000≤ Tcarb<1600oC характерны немонотонные зависимости постоянной Холла R от величины магнитного поля, что наиболее вероятно обусловлено вкладом разных групп носителей заряда: электронов и дырок. В образцах BE-C(Fe) c Tсarb=1600oC коэффициент Холла соответствует металлическому состоянию, что связывается с гомогенизацией проводящей среды в результате формирования значительного объема графитовой фазы. Работа выполнена при частичной поддержке РФФИ (грант N 14-03-00496) и программы Президиума РАН (П-20). DOI: 10.21883/FTT.2017.04.44269.341

show abstract

Sucrose‐Based Dense, Pure, and Highly‐Crystalline Graphitic Materials for Lithium‐Ion Batteries

Jurkiewicz,

Liszka,

Gancarz

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

At present, most synthetic graphite materials commonly used as anode active ingredients in lithium‐ion cells are produced by graphitization of petroleum cokes. The carbon footprint associated with synthetic graphite production is significant. Thus, bio‐derived and cheap precursors, such as saccharides, would be an attractive alternative for the sustainable production of graphitic carbons. However, they are non‐graphitizing at temperatures as high as 3000 °C, preserving the curved, fullerene‐like structure of graphene layers and microporosity. Consequently, many lithium ions are consumed during the formation of solid electrolyte interphase films and passivated in the nanovoids. Here, a method for the production of pure, crystalline, graphitic materials based on sucrose disposed of microporosity is presented, which also works with a variety of saccharides and other organic precursors of hard carbons—generally considered incapable of such transformation. This process employs catalytic graphitization by Si particles at high temperatures. The electrochemical response of such derived sucrose‐based graphite in Li‐ion half‐cells demonstrated its feasibility to serve as an anode active material for rechargeable Li‐ion batteries.

show abstract

Catalytic graphitization of three-dimensional wood-derived porous scaffolds

Cited by 45 publications

References 31 publications

Microstructure, elastic and inelastic properties of partially graphitized biomorphic carbons

Microstructure, elastic and inelastic properties of partially graphitized biomorphic carbons

Особенности электрических свойств биоуглеродов BE-C(Fe), карбонизированных в присутствии Fe-содержащего катализатора

Sucrose‐Based Dense, Pure, and Highly‐Crystalline Graphitic Materials for Lithium‐Ion Batteries

Contact Info

Product

Resources

About